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GEOMON
[Source: GEOmon Home Page, http://www.geomon.eu/ ] GEOmon is a European project contributing to GEOSS. Its mission is to build an integrated pan-European atmospheric observing system of greenhouse gases, reactive gases, aerosols, and stratospheric ozone. Ground-based and air-borne data are sustained and analyzed, complementary with satellite observations, in order to quantify and understand the ongoing changes of the atmospheric composition.